CN112720788A - Manufacturing process of UHPC (ultra high performance polycarbonate) component - Google Patents
Manufacturing process of UHPC (ultra high performance polycarbonate) component Download PDFInfo
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- CN112720788A CN112720788A CN202011579176.9A CN202011579176A CN112720788A CN 112720788 A CN112720788 A CN 112720788A CN 202011579176 A CN202011579176 A CN 202011579176A CN 112720788 A CN112720788 A CN 112720788A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/29—Producing shaped prefabricated articles from the material by profiling or strickling the material in open moulds or on moulding surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
- B28C5/402—Methods
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a manufacturing process of a UHPC component, which comprises the following steps: firstly, taking cement as a main cementing material, mixing the cement, water, sand and stones according to a certain proportion, putting the mixture into special stirring equipment, stirring and mixing according to the stirring step and time requirement, and then uniformly adding short glass fibers into the slurry; after the cement mortar is stirred, the cement mortar is conveyed to a spray gun by a pump, and glass fiber is also conveyed to a muzzle cutting machine and cut into preset length; according to the invention, the glass fiber is added and the layered spraying process is matched, so that the surface layer of the concrete member has stronger cohesion and is not easy to crack, and the spraying method is matched, so that the two-dimensional flatness and uniformity of the member can be ensured, and meanwhile, the integral tensile property and ductility are enhanced, thereby solving the problems that the surface layer is easy to crack in the manufacturing process of the existing concrete member, the surface layer manufactured by the traditional plastering and pressing method cannot ensure the surface flatness, the attractiveness is influenced, and meanwhile, the integral tensile property and ductility of the member are poor.
Description
Technical Field
The invention relates to the technical field of ultra-high performance concrete, in particular to a manufacturing process of a UHPC (ultra high performance concrete) component.
Background
Ultra-high performance concrete, referred to as UHPC for short, also called reactive powder concrete, is the most innovative cement-based engineering material in the last thirty years, achieving a large span of engineering material properties. The ultra-high performance concrete comprises two aspects of ultra-high, namely ultra-high durability and ultra-high mechanical property, the design theory of the ultra-high performance concrete is the maximum stacking density theory, particles with different particle diameters of the composition materials form closest stacking in the optimal proportion, namely, gaps formed by stacking millimeter-sized particles (aggregates) are filled with micron-sized particles (cement, fly ash and mineral powder), and gaps formed by stacking the micron-sized particles are filled with submicron-sized particles (silica fume).
In the existing manufacturing process of concrete members, a surface layer is easy to crack, the surface layer manufactured by a traditional plastering and pressing method cannot guarantee the surface flatness degree, the attractiveness is affected, and meanwhile, the integral tensile property and ductility of the members are poor.
Disclosure of Invention
The invention aims to provide a manufacturing process of a UHPC component, which has the advantage of effectively improving the overall performance of the component so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a manufacturing process of a UHPC component comprises the following steps:
(1) stirring: firstly, taking cement as a main cementing material, mixing the cement, water, sand and stones according to a certain proportion, putting the mixture into special stirring equipment, stirring and mixing according to the stirring step and time requirement, and then uniformly adding short glass fibers into the slurry;
(2) surface layer preparation: after the cement mortar is stirred, the cement mortar is conveyed to a spray gun by a pump, glass fiber is also conveyed to a muzzle cutting machine, is cut into preset length, is uniformly sprayed into a die together with the mortar, and is compacted by rolling;
(2.1) enabling the muzzle to be vertical to the spraying surface, keeping the height of the spray gun the same, enabling the slurry to enter a die at the same pressure, and starting to spray from the edge or corner of the component;
(2.2) spraying in layers in the interaction direction of each layer to obtain two-dimensional uniformity, wherein the spray guns move transversely on the first layer, the spray guns move longitudinally on the second layer, and the spray guns move transversely on the third layer;
(2.3) compacting by using a special rolling tool after each layer is sprayed, and pressing after initial setting of the slurry is not allowed;
(3) curing and demolding: immediately covering with a polyethylene film before demolding after the member is manufactured, avoiding water loss of the product until demolding, maintaining in a curing room after demolding, simultaneously matching with a water spraying or mist spraying facility or manually watering to ensure certain humidity, and maintaining in a proper temperature environment at a later stage;
(4) surface treatment: and (3) polishing, repairing, cleaning and spraying paint on the surface of the produced UHPC component, wherein the spraying paint comprises a protective agent or emulsion paint or fluorocarbon paint or stone paint, and finally packaging.
Preferably, in the step (1), the weight error of the material should be controlled to be less than or equal to ± 2%, the stirring device is a variable speed stirrer, and a timing device is required to be matched during the stirring process.
Preferably, in the step (1), the stirring must be divided into two steps, wherein the first step is rapid stirring to form cement slurry with good workability, and the second step is slow stirring, and the chopped glass fibers are added into the slurry at the moment.
Preferably, in the step (2), the predetermined length range is 25-50mm, the air pressure is adjusted before spraying, and the proportion of the glass fiber and the sizing agent is tested to ensure that the content of the glass fiber is consistent with the designed mixing ratio.
Preferably, in the step (2), the proportion of the surface layer is determined through tests, the mechanical and physical properties of the surface layer meet the use requirements, the surface layer is compatible with the base layer of the component, the thickness of the texture surface layer is greater than 5mm, and the thickness of the surface thin layer is 1-3 mm.
Preferably, in the step (2.1), the layer-by-layer spraying is carried out during the spraying, the thickness of each layer is 3-6mm, the spraying route is reciprocated in a zigzag shape, and the new spraying width is required to cover half of the previous width.
Preferably, in the step (3), the curing temperature before demolding should be greater than 15 ℃, the curing relative humidity after demolding is greater than 95%, and the temperature is greater than or equal to 15 ℃.
Preferably, in step (3), the product should be stored in or covered by a shed outdoors in summer, and the product should be stored in an environment with a temperature of 5 ℃ or higher in winter, and the minimum storage temperature is more than 0 ℃.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the glass fiber is added and the layered spraying process is matched, so that the surface layer of the concrete member has stronger cohesion and is not easy to crack, and the spraying method is matched, so that the two-dimensional flatness and uniformity of the member can be ensured, and meanwhile, the integral tensile property and ductility are enhanced, thereby solving the problems that the surface layer is easy to crack in the manufacturing process of the existing concrete member, the surface layer manufactured by the traditional plastering and pressing method cannot ensure the surface flatness, the attractiveness is influenced, and meanwhile, the integral tensile property and ductility of the member are poor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A manufacturing process of a UHPC component comprises the following steps:
(1) stirring: firstly, taking cement as a main cementing material, mixing the cement, water, sand and stones according to a certain proportion, putting the mixture into special stirring equipment, stirring and mixing according to the stirring step and time requirement, and then uniformly adding short glass fibers into the slurry;
(2) surface layer preparation: after the cement mortar is stirred, the cement mortar is conveyed to a spray gun by a pump, glass fiber is also conveyed to a muzzle cutting machine, is cut into preset length, is uniformly sprayed into a die together with the mortar, and is compacted by rolling;
(2.1) enabling the muzzle to be vertical to the spraying surface, keeping the height of the spray gun the same, enabling the slurry to enter a die at the same pressure, and starting to spray from the edge or corner of the component;
(2.2) spraying in layers in the interaction direction of each layer to obtain two-dimensional uniformity, wherein the spray guns move transversely on the first layer, the spray guns move longitudinally on the second layer, and the spray guns move transversely on the third layer;
(2.3) compacting by using a special rolling tool after each layer is sprayed, and pressing after initial setting of the slurry is not allowed;
(3) curing and demolding: immediately covering with a polyethylene film before demolding after the member is manufactured, avoiding water loss of the product until demolding, maintaining in a curing room after demolding, simultaneously matching with a water spraying or mist spraying facility or manually watering to ensure certain humidity, and maintaining in a proper temperature environment at a later stage;
(4) surface treatment: and (3) polishing, repairing, cleaning and spraying paint on the surface of the produced UHPC component, wherein the spraying paint comprises a protective agent or emulsion paint or fluorocarbon paint or stone paint, and finally packaging.
The first embodiment is as follows:
a manufacturing process of a UHPC component comprises the following steps:
(1) stirring: firstly, taking cement as a main cementing material, mixing the cement, water, sand and stones according to a certain ratio, putting the cement, the sand and the stones into special stirring equipment, controlling the weight error of the materials to be less than or equal to +/-2%, wherein the stirring equipment is a variable speed stirrer and needs to be matched with a timing device in the stirring process to avoid insufficient stirring or overtime stirring, stirring and mixing according to the stirring step and the time requirement, then uniformly adding short glass fibers into the slurry, wherein the stirring is divided into two steps, the first step is rapid stirring to form cement slurry with good workability, and the second step is slow stirring, and the short glass fibers are added into the slurry at the moment;
(2) surface layer preparation: after the cement mortar is stirred, the cement mortar is conveyed to a spray gun by a pump, glass fiber is also conveyed to a muzzle cutting machine and cut into preset length, the preset length range is 25-50mm, air pressure needs to be adjusted before spraying, the proportion of the glass fiber and the slurry is tested, the content of the glass fiber is consistent with the designed mixing ratio, the glass fiber and the slurry are uniformly sprayed into a mold together with the mortar, and then rolling is carried out to be compact;
the surface layer is a texture layer on the surface of the component or a surface thin layer for covering glass fiber spraying, the surface layer slurry does not contain glass fiber, the surface layer proportion is determined through tests, the mechanical and physical properties of the surface layer meet the use requirements, the surface layer is compatible with the base layer of the component, the thickness of the texture surface layer is more than 5mm, the thickness of the surface thin layer is 1-3mm, the surface layer can be doped with polymers in order to prevent surface cracking, and the surface layer is not suitable for spraying a smooth thin layer on the component of which the surface is sprayed with emulsion paint or real stone paint.
(2.1) enabling the muzzle to be vertical to the spraying surface, keeping the height of the spray gun the same, enabling the slurry to enter a die at the same pressure, and starting to spray from the edge or corner of the component;
(2.2) spraying in layers in the interaction direction of each layer to obtain two-dimensional uniformity, wherein the spray guns move transversely on the first layer, the spray guns move longitudinally on the second layer, and the spray guns move transversely on the third layer;
(2.3) compacting by using a special rolling tool after each layer is sprayed, and pressing after initial setting of the slurry is not allowed;
(3) curing and demolding: immediately covering with a polyethylene film before demolding after the member is manufactured, avoiding water loss of the product until demolding, maintaining in a curing room after demolding, simultaneously matching with a water spraying or mist spraying facility or manually watering to ensure certain humidity, and maintaining in a proper temperature environment at a later stage;
(4) surface treatment: and (3) polishing, repairing, cleaning and spraying paint on the surface of the produced UHPC component, wherein the spraying paint comprises a protective agent or emulsion paint or fluorocarbon paint or stone paint, and finally packaging.
Example two:
a manufacturing process of a UHPC component comprises the following steps:
(1) stirring: firstly, taking cement as a main cementing material, mixing the cement, water, sand and stones according to a certain ratio, putting the cement, the sand and the stones into special stirring equipment, controlling the weight error of the materials to be less than or equal to +/-2%, wherein the stirring equipment is a variable speed stirrer and needs to be matched with a timing device in the stirring process to avoid insufficient stirring or overtime stirring, stirring and mixing according to the stirring step and the time requirement, then uniformly adding short glass fibers into the slurry, wherein the stirring is divided into two steps, the first step is rapid stirring to form cement slurry with good workability, and the second step is slow stirring, and the short glass fibers are added into the slurry at the moment;
(2) surface layer preparation: after the cement mortar is stirred, the cement mortar is conveyed to a spray gun by a pump, glass fiber is also conveyed to a muzzle cutting machine and cut into preset length, the preset length range is 25-50mm, air pressure needs to be adjusted before spraying, the proportion of the glass fiber and the slurry is tested, the content of the glass fiber is consistent with the designed mixing ratio, the glass fiber and the slurry are uniformly sprayed into a mold together with the mortar, and then rolling is carried out to be compact;
the surface layer is a texture layer on the surface of the component or a surface thin layer for covering glass fiber spraying, the surface layer slurry does not contain glass fiber, the surface layer proportion is determined through tests, the mechanical and physical properties of the surface layer meet the use requirements, the surface layer is compatible with the base layer of the component, the thickness of the texture surface layer is more than 5mm, the thickness of the surface thin layer is 1-3mm, the surface layer can be doped with polymers in order to prevent surface cracking, and the surface layer is not suitable for spraying a smooth thin layer on the component of which the surface is sprayed with emulsion paint or real stone paint.
(2.1) enabling the muzzle to be vertical to the spraying surface, keeping the height of the spray gun the same, enabling the slurry to enter a die at the same pressure, starting spraying from the edge or corner of a component, and spraying layer by layer when spraying, wherein the thickness of each layer is 3-6mm, the spraying route reciprocates in a zigzag manner, and the new spraying width covers half of the front width;
(2.2) spraying in layers in the interaction direction of each layer to obtain two-dimensional uniformity, wherein a first layer of transverse moving spray guns, a second layer of longitudinal moving spray guns and a third layer of transverse moving spray guns are not used for spraying a layer before spraying, so that the condition that only mortar is sprayed or only glass fibers are sprayed is avoided, and the phenomenon that no glass fibers or glass fibers are concentrated locally is avoided;
(2.3) compacting by using a special rolling tool after each layer is sprayed, and pressing after initial setting of the slurry is not allowed;
(3) curing and demolding: immediately covering with a polyethylene film before demolding after the member is manufactured, avoiding water loss of the product until demolding, maintaining in a curing room after demolding, simultaneously matching with a water spraying or mist spraying facility or manually watering to ensure certain humidity, and maintaining in a proper temperature environment at a later stage;
curing is to ensure sufficient humidity and proper temperature during hardening of the component to ensure that the hydration reaction is continued.
(4) Surface treatment: and (3) polishing, repairing, cleaning and spraying paint on the surface of the produced UHPC component, wherein the spraying paint comprises a protective agent or emulsion paint or fluorocarbon paint or stone paint, and finally packaging.
Example three:
a manufacturing process of a UHPC component comprises the following steps:
(1) stirring: firstly, taking cement as a main cementing material, mixing the cement, water, sand and stones according to a certain ratio, putting the cement, the sand and the stones into special stirring equipment, controlling the weight error of the materials to be less than or equal to +/-2%, wherein the stirring equipment is a variable speed stirrer and needs to be matched with a timing device in the stirring process to avoid insufficient stirring or overtime stirring, stirring and mixing according to the stirring step and the time requirement, then uniformly adding short glass fibers into the slurry, wherein the stirring is divided into two steps, the first step is rapid stirring to form cement slurry with good workability, and the second step is slow stirring, and the short glass fibers are added into the slurry at the moment;
(2) surface layer preparation: after the cement mortar is stirred, the cement mortar is conveyed to a spray gun by a pump, glass fiber is also conveyed to a muzzle cutting machine and cut into preset length, the preset length range is 25-50mm, air pressure needs to be adjusted before spraying, the proportion of the glass fiber and the slurry is tested, the content of the glass fiber is consistent with the designed mixing ratio, the glass fiber and the slurry are uniformly sprayed into a mold together with the mortar, and then rolling is carried out to be compact;
the surface layer is a texture layer on the surface of the component or a surface thin layer for covering glass fiber spraying, the surface layer slurry does not contain glass fiber, the surface layer proportion is determined through tests, the mechanical and physical properties of the surface layer meet the use requirements, the surface layer is compatible with the base layer of the component, the thickness of the texture surface layer is more than 5mm, the thickness of the surface thin layer is 1-3mm, the surface layer can be doped with polymers in order to prevent surface cracking, and the surface layer is not suitable for spraying a smooth thin layer on the component of which the surface is sprayed with emulsion paint or real stone paint.
(2.1) enabling the muzzle to be vertical to the spraying surface, keeping the height of the spray gun the same, enabling the slurry to enter a die at the same pressure, starting spraying from the edge or corner of a component, and spraying layer by layer when spraying, wherein the thickness of each layer is 3-6mm, the spraying route reciprocates in a zigzag manner, and the new spraying width covers half of the front width;
(2.2) spraying in layers in the interaction direction of each layer to obtain two-dimensional uniformity, wherein a first layer of transverse moving spray guns, a second layer of longitudinal moving spray guns and a third layer of transverse moving spray guns are not used for spraying a layer before spraying, so that the condition that only mortar is sprayed or only glass fibers are sprayed is avoided, and the phenomenon that no glass fibers or glass fibers are concentrated locally is avoided;
(2.3) compacting by using a special rolling tool after each layer is sprayed, and pressing after initial setting of the slurry is not allowed;
(3) curing and demolding: immediately covering the component with a polyethylene film before demolding after the component is manufactured, avoiding water loss of the product until demolding, wherein the curing temperature before demolding is higher than 15 ℃, the curing relative humidity after demolding is higher than 95%, the temperature is higher than or equal to 15 ℃, and under the condition, the curing time is as follows: the silicate cement and the white cement are maintained in a curing room after demoulding for 7 days and the sulphoaluminate cement is maintained in a 3-day curing room, and meanwhile, a water spraying or mist spraying facility or manual watering is matched to ensure certain humidity, and the later curing is performed in a proper temperature environment;
curing is to ensure sufficient humidity and proper temperature during hardening of the components to ensure that the hydration reaction is continued, the products should be stored in or covered by the shed outdoors in summer, and stored in an environment at a temperature above 5 ℃ in winter, with a minimum storage temperature of greater than 0 ℃.
(1) Surface treatment: and (3) polishing, repairing, cleaning and spraying paint on the surface of the produced UHPC component, wherein the spraying paint comprises a protective agent or emulsion paint or fluorocarbon paint or stone paint, and finally packaging.
According to the invention, the glass fiber is added and the layered spraying process is matched, so that the surface layer of the concrete member has stronger cohesion and is not easy to crack, and the spraying method is matched, so that the two-dimensional flatness and uniformity of the member can be ensured, and meanwhile, the integral tensile property and ductility are enhanced, thereby solving the problems that the surface layer is easy to crack in the manufacturing process of the existing concrete member, the surface layer manufactured by the traditional plastering and pressing method cannot ensure the surface flatness, the attractiveness is influenced, and meanwhile, the integral tensile property and ductility of the member are poor.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A UHPC component manufacturing process is characterized in that: the method comprises the following steps:
(1) stirring: firstly, taking cement as a main cementing material, mixing the cement, water, sand and stones according to a certain proportion, putting the mixture into special stirring equipment, stirring and mixing according to the stirring step and time requirement, and then uniformly adding short glass fibers into the slurry;
(2) surface layer preparation: after the cement mortar is stirred, the cement mortar is conveyed to a spray gun by a pump, glass fiber is also conveyed to a muzzle cutting machine, is cut into preset length, is uniformly sprayed into a die together with the mortar, and is compacted by rolling;
(2.1) enabling the muzzle to be vertical to the spraying surface, keeping the height of the spray gun the same, enabling the slurry to enter a die at the same pressure, and starting to spray from the edge or corner of the component;
(2.2) spraying in layers in the interaction direction of each layer to obtain two-dimensional uniformity, wherein the spray guns move transversely on the first layer, the spray guns move longitudinally on the second layer, and the spray guns move transversely on the third layer;
(2.3) compacting by using a special rolling tool after each layer is sprayed, and pressing after initial setting of the slurry is not allowed;
(3) curing and demolding: immediately covering with a polyethylene film before demolding after the member is manufactured, avoiding water loss of the product until demolding, maintaining in a curing room after demolding, simultaneously matching with a water spraying or mist spraying facility or manually watering to ensure certain humidity, and maintaining in a proper temperature environment at a later stage;
(4) surface treatment: and (3) polishing, repairing, cleaning and spraying paint on the surface of the produced UHPC component, wherein the spraying paint comprises a protective agent or emulsion paint or fluorocarbon paint or stone paint, and finally packaging.
2. A process for making a UHPC component according to claim 1 wherein: in the step (1), the weight error of the material is controlled to be less than or equal to +/-2%, the stirring equipment is a variable speed stirrer, and a timing device is matched in the stirring process.
3. A process for making a UHPC component according to claim 1 wherein: in the step (1), the stirring is divided into two steps, wherein the first step is to quickly stir to form cement slurry with good workability, the second step is to slowly stir, and the chopped glass fiber is added into the slurry at the moment.
4. A process for making a UHPC component according to claim 1 wherein: in the step (2), the preset length range is 25-50mm, air pressure needs to be adjusted before spraying, and the proportion of the glass fiber and the sizing agent is tested to ensure that the content of the glass fiber is consistent with the designed mixing ratio.
5. A process for making a UHPC component according to claim 1 wherein: in the step (2), the proportion of the surface layer is determined through tests, the mechanical and physical properties of the surface layer meet the use requirements, the surface layer is compatible with the component base layer, the texture surface layer is larger than 5mm, and the surface thin layer is 1-3mm in thickness.
6. A process for making a UHPC component according to claim 1 wherein: in the step (2.1), the layer-by-layer spraying is required during spraying, the thickness of each layer is 3-6mm, the spraying route reciprocates in a zigzag manner, and the new spraying width is required to cover half of the previous width.
7. A process for making a UHPC component according to claim 1 wherein: in the step (3), the curing temperature before demolding is higher than 15 ℃, the curing relative humidity after demolding is higher than 95%, and the temperature is higher than or equal to 15 ℃.
8. A process for making a UHPC component according to claim 1 wherein: in the step (3), the product should be stored in a shed or covered outdoors in summer, and the product should be stored in an environment with the temperature above 5 ℃ in winter, wherein the minimum storage temperature is more than 0 ℃.
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| CN114150877A (en) * | 2021-12-08 | 2022-03-08 | 湖南人健宝固高新科技发展有限公司 | Construction method of ultra-high performance concrete |
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| 无: "不同grc制作工艺和对比分析", 《筑龙学社》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113752375A (en) * | 2021-09-15 | 2021-12-07 | 保利长大工程有限公司 | UHPC (ultra high performance polycarbonate) segment beam prefabrication method |
| CN114150877A (en) * | 2021-12-08 | 2022-03-08 | 湖南人健宝固高新科技发展有限公司 | Construction method of ultra-high performance concrete |
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Application publication date: 20210430 |